.preloader {
  position: fixed;
  display: none;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 9999999999;
  background-color: rgba(126, 126, 128, 0.76);
  background-image: url(/images/preloader.gif);
  background-repeat: no-repeat;
  background-position: center center;
}